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Prefabricated steel-concrete composite structure bridge and its construction method

A combined structure and concrete technology, which is used in the erection/assembly of bridges, bridges, bridge parts, etc., can solve the problems that the combined stress effect is not as uniform as the shear nails, the difficulty of installing prefabricated panels, and the increase in the amount of concrete poured in place. To achieve the effect of reasonable force, improve construction quality, fast and simple construction

Inactive Publication Date: 2018-08-17
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the drying shrinkage of concrete is constrained by steel beams and shear keys to produce tensile stress, which is easy to produce early construction cracks; due to the influence of environment, climate and other factors, the quality stability of cast-in-place concrete is worse than that of factory precast concrete slabs; Long construction period compared to prefabricated panel method
The disadvantages are: the gap filling between the precast concrete slab and the steel beam is relatively weak, which affects the durability of the structure; when the bridge is wide, the bridge deck should be divided into several pieces in the transverse direction, on the one hand, the amount of concrete cast in place increases , on the other hand, it increases the difficulty of installing precast slabs at the cantilever; precast concrete slabs and steel beams are anchored and combined by group nails, and the combined force effect is not as good as that of shear nails evenly arranged

Method used

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  • Prefabricated steel-concrete composite structure bridge and its construction method
  • Prefabricated steel-concrete composite structure bridge and its construction method
  • Prefabricated steel-concrete composite structure bridge and its construction method

Examples

Experimental program
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Effect test

Embodiment 2

[0047] Embodiment 2: as Figure 4~6 As shown, in this embodiment, a gap of 100-300 mm is left between the two longitudinal ribs 7 connected together, the longitudinal ribs are L-shaped, and the web 11 of the L-shaped longitudinal ribs is provided with bolt holes, The longitudinal ribs between two adjacent composite beams are connected together by connecting steel plates 12 and bolts 9, and the connecting steel plates 12 and the webs 11 are connected by bolts 9; The steel cage 13 between the two longitudinal ribs is also poured with joint concrete 10, and the longitudinal rib 7 is welded with a shear connector 3 that connects the joint concrete and the upper flange steel plate, When the bridge deck is wide, the gap between the longitudinal ribs forms small longitudinal beams, which is conducive to the stress on the main beam and reduces the construction amount of concrete wet joints.

[0048] The construction method of the assembled steel-concrete composite structure bridge in...

Embodiment 3

[0049] Example three: as Figure 7 As shown, the difference between this embodiment and the first embodiment is that the structure of the longitudinal rib is different, and the lower side of the longitudinal rib also has a web 11 bent inward at 90°, so that the longitudinal rib forms an L-shaped structure.

Embodiment 4

[0050] Example four: as Figure 8 As shown, the difference between this embodiment and the second embodiment is that the cross-section of the steel beam in this embodiment is a box-shaped cross-section.

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Abstract

The invention relates to an assembled steel-concrete combination structure bridge. At least two prefabricated combination beams are jointed in the width direction of the bridge; each combination beam includes a concrete prefabricated bridge face plate and a steel beam for supporting the concrete prefabricated bridge face plate; a top flange steel plate positioned under the concrete prefabricated bridge face plate is arranged above the steel beam; shearing connection members for integrally connecting the concrete prefabricated bridge face plate and the top flange steel plate together are welded onto the top flange steel plate; longitudinal rib plates are arranged on edges of the top flange steel plate at two sides of the combined beam; and two adjacent combined beams are connected together through two adjacent rib plates. The invention also provides a construction method which can form an assembled steel-concrete combination structure bridge by performing bolting and cast-in-place joint concrete on prefabricated single combined beams. The assembled steel-concrete combination structure bridge is rapid and simple in construction, can avoid on-site modeling, and can avoid the problems of large area concrete cast-in-place, maintenance difficulties, and construction fractures.

Description

technical field [0001] The invention relates to an assembled steel-concrete composite structure bridge and a construction method thereof. Background technique [0002] Steel and concrete are the main structural materials for building bridges. These two materials have their own advantages and disadvantages in terms of physical and mechanical properties. Combining steel and concrete in a certain way can make full use of the traditional concrete structure and The advantages of the steel structure, while limiting the occurrence of its adverse effects, so as to make the best use of everything and maximize the strengths and avoid weaknesses. Steel-concrete composite beam is a kind of bridge structure that has been widely used in recent years and its technology is relatively mature. The construction of concrete slabs has an important impact on the bearing capacity and durability of composite girder bridges. At present, the construction of concrete slabs mainly includes the follow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D1/00E01D19/00E01D21/00
CPCE01D1/00E01D19/00E01D21/00
Inventor 赵秋邓玮琳李中南陈宝春
Owner FUZHOU UNIV